641264402154 has 16 divisors (see below), whose sum is σ = 1286626344192. Its totient is φ = 213071877408.

The previous prime is 641264402143. The next prime is 641264402161. The reversal of 641264402154 is 451204462146.

It is a super-2 number, since 2×641264402154² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 170728794 + ... + 170732549.

It is an arithmetic number, because the mean of its divisors is an integer number (80414146512).

Almost surely, 2^641264402154 is an apocalyptic number.

641264402154 is an abundant number, since it is smaller than the sum of its proper divisors (645361942038).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

641264402154 is a wasteful number, since it uses less digits than its factorization.

641264402154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341461661.

The product of its (nonzero) digits is 184320, while the sum is 39.

The spelling of 641264402154 in words is "six hundred forty-one billion, two hundred sixty-four million, four hundred two thousand, one hundred fifty-four".